Details

Autor(en) / Beteiligte

• Watanabe, H
• Lorusso, G
• Nishimura, S
• Xu, Z Y
• Sumikama, T
• Söderström, P-A
• Doornenbal, P
• Browne, F
• Gey, G
• Jung, H S
• Taprogge, J
• Vajta, Zs
• Wu, J
• Yagi, A
• Baba, H
• Benzoni, G
• Chae, K Y
• Crespi, F C L
• Fukuda, N
• Gernhäuser, R
• Inabe, N
• Isobe, T
• Jungclaus, A
• Kameda, D
• Kim, G D
• Kim, Y K
• Kojouharov, I
• Kondev, F G
• Kubo, T
• Kurz, N
• Kwon, Y K
• Lane, G J
• Li, Z
• Moon, C-B
• Montaner-Pizá, A
• Moschner, K
• Naqvi, F
• Niikura, M
• Nishibata, H
• Nishimura, D
• Odahara, A
• Orlandi, R
• Patel, Z
• Podolyák, Zs
• Sakurai, H
• Schaffner, H
• Simpson, G S
• Steiger, K
• Suzuki, H
• Takeda, H
• Wendt, A
• Yoshinaga, K

Titel

Isomers in 128Pd and 126Pd: evidence for a robust shell closure at the neutron magic number 82 in exotic palladium isotopes

Ist Teil von

• Physical review letters, 2013-10, Vol.111 (15), p.152501-152501

Ort / Verlag

United States: American Physical Society

Erscheinungsjahr

2013

Quelle

PROLA

Beschreibungen/Notizen

• The level structures of the very neutron-rich nuclei 128Pd and 126Pd have been investigated for the first time. In the r-process waiting-point nucleus 128Pd, a new isomer with a half-life of 5.8(8) μs is proposed to have a spin and parity of 8(+) and is associated with a maximally aligned configuration arising from the g(9/2) proton subshell with seniority υ=2. For 126Pd, two new isomers have been identified with half-lives of 0.33(4) and 0.44(3) μs. The yrast 2(+) energy is much higher in 128Pd than in 126Pd, while the level sequence below the 8(+) isomer in 128Pd is similar to that in the N=82 isotone 130Cd. The electric quadrupole transition that depopulates the 8(+) isomer in 128Pd is more hindered than the corresponding transition in 130Cd, as expected in the seniority scheme for a semimagic, spherical nucleus. These experimental findings indicate that the shell closure at the neutron number N=82 is fairly robust in the neutron-rich Pd isotopes.